Oral appliance



FIG. 1 is a front perspective view of an oral appliance according to afirst embodiment of my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof, the right side elevationview being a mirror image thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front perspective view of an oral appliance according to asecond embodiment of my new design;

FIG. 9 is a rear perspective view thereof;

FIG. 10 is a front elevation view thereof;

FIG. 11 is a rear elevation view thereof;

FIG. 12 is a left side elevation view thereof, the right side elevationview being a mirror image thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof.

The features shown in broken lines are environmental only and form nopart of the claimed design.

CLAIM The ornamental design for an oral appliance, as shown anddescribed.